I find that that emulator doesn't display the robopon.
Here's the info:
Emu version : 1.8.0
Emu Type : Optimize Version
File : D:\vba\robopon2ringversion.gba
BIOS Checksum: 0B83ECAD
Internal name: ROBOPON2RING
Game code : ARPE
Using BIOS : 0
Skip BIOS : 0
Disable SFX : 0
Skip intro : 0
Throttle : 0
Rewind : 0
Auto frame : 0
Video option : 4
Render type : 2
Color depth : 16
Red shift : 0000000b
Green shift : 00000006
Blue shift : 00000000
Layer setting: FF00
Mirroring : 0
Save type : 0 (0)
Flash size : 00010000 (00010000)
RTC : 1 (1)
AGBPrint : 0
Speed toggle : 0
Synchronize : 1
Sound OFF : 0
Channels : 030f
Old Sync : 0
Priority : 0
Filters : 0 (1)
Cheats : 0
GB Cheats : 0
GB Emu Type : 4
Video Plugin : 2xSaI.rpi
I have also included a screenshot.